Blender for ingredients into soft-serve freezer products

ABSTRACT

An assembly is mounted to a soft serve confection freezer. It includes a set of modules in a circular array and separately replaceable in a magazine. Each module supports a container storing a dry food ingredient in particulate form, and has a motor driven product impeller for controlled discharge of particulates from the container to a blender assembly. The blender assembly has a housing and screw-type auger of cooperating configurations and which cooperate with a central passageway for frozen confection flowing from the freezer, to blend solids into the confection and discharge into a customer&#39;s container for immediate consumption. Control panel selection of ingredients by the operator according to the customer&#39;s order, is provided. Components are arranged to facilitate cleaning.

BACKGROUND OF THE INVENTION

This invention relates generally to apparatus for dispensing flavored,flow-able frozen foods to a customer for soft-serve ice cream, ice milk,ices, smoothies, slushes, shakes or the like.

My U.S. Pat. No. 4,793,520 issued Dec. 27, 1988 and certain patentscited therein, disclose various approaches to mixing several differentflavoring liquids to a base mix of ice cream. U.S. Pat. No. 3,001,770issued to Mueller on Sep. 26, 1961 shows a machine for mixing differentflavoring liquids with ice cream and has a device for injecting nutsinto the mixture. To the best of my knowledge, there is no apparatusavailable which can be connected to a conventional freezer machine forsoft-serve ice cream or some other semi-frozen edible product, and whichis useful to select and blend one or more different ingredients into thefood product of the freezer machine for dispensing into a cone or cup toa customer immediately upon demand. The present invention is addressedto this need.

SUMMARY OF THE INVENTION

Described briefly, a typical embodiment of the invention comprisesmethod and apparatus readily adaptable to use with conventional,commercially available freezer dispensers for semi-frozen foods, andenabling selection and blending various different food ingredients insolid form into a food product dispensed as a fluid (hereinafterreferred to as frozen base product) from the freezer dispenser at atemperature below 0 degrees Celsius, and dispensing selected blends ofsolids in frozen base product in fluid form to a customer's container ondemand.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side elevational view of a conventional soft-serve ice creamfreezer machine with a blender dispenser mounted to it according to oneembodiment of the present invention.

FIG. 2A is an enlarged front view in section of an ingredient storageand transfer assembly.

FIG. 2B is a front view in section on the same scale as FIG. 2A andshowing a blender assembly.

FIG. 3 is a side view of an ingredient container module.

FIG. 4 is a top plan view of an array of eight ingredient containers ona scale intermediate FIGS. 1 and 3.

FIG. 5 is a perspective view of a mounting base for the ingredientstorage assembly.

FIG. 6 is a face view of an upper support plate for the ingredientstorage assembly.

FIG. 7 is a face view of a lower support plate for the ingredientstorage assembly.

FIG. 8 is a perspective view of a dispensing module.

FIG. 9 is an enlarged elevational view of a blending auger.

FIG. 10 is a bottom view of the blending auger.

FIG. 11 is a fragmentary longitudinal sectional view taken at line 11-11in FIG. 10, viewed in the direction of the arrows and showing theblending auger in a blender hopper which is shown in full section.

FIG. 12 is an elevational view of the auger in the hopper shown insection and viewed in the direction of arrows 12-12 in FIG. 11.

FIG. 13 is a fragmentary longitudinal sectional view of part of theblending auger and blender hopper taken at line 13-13 in FIG. 10 andshowing the shape of the lower end portion of the auger core at aposition about 60 degrees of rotational index about axis 93 from theFIG. 11 position.

FIG. 14 is a view similar to FIG. 13 but taken at line 14-14 in FIG. 10and showing the shape of the auger core and flights at a slightlyfurther rotational index position where portions of the core are cut-outto admit ingredient solids into a downward flowing frozen confectionbase product.

FIG. 15 is a top view of the blender hopper, showing one possible outletshape, and showing mounting flanges.

FIG. 16A is a top plan view of a transfer impeller.

FIG. 16B is a section taken at line B-B in FIG. 16A and viewed in thedirection of the arrows.

FIG. 17 is a top plan view of an agitator.

FIG. 18 is a bottom view of a blender housing, with bottom coveringsremoved.

FIG. 19 is a front view of a data entry panel.

DESCRIPTION OF THE ILLUSTRATED EMBODIMENT

Referring now to the drawings in detail, a soft-serve ice cream freezerassembly 11 is supported on wheels 12 and has a discharge spigot 13 on afront plate 14 removable from the freezer, usually by loosening fourknobs. The spigot has an operating handle 16. Upon pulling the handledown, a frozen, usually unflavored, base product is discharged from thefreezer through the spigot in the direction of arrow 17. Examples ofsuch soft serve freezers are Taylor Model 754,338, 339, 741, H84, 8754,C706, C707, and C708. Other brands of freezers may be used also. Someolder Taylor models and other brands are identified in myabove-mentioned patent.

Apparatus incorporating an embodiment of the present invention includesan ingredient storage assembly, a blender assembly, means for transferof selected ingredients from the storage assembly to the blenderassembly, and related mounting, selection and control devices.

The ingredient storage and transfer assembly 18 is attached to the topof the freezer by use of a mounting plate 19 (FIG. 1); This plate uses adouble-faced bonding tape that bonds the plate to the top of the freezercabinet. Other or additional fasteners may be used, if desired. Mountingbase 21 is a molded plastic part FIG. 5 having a flange 21F with slots21S in its rear-edge receiving upstanding studs (not shown) on themounting plate 19. It is attached to the mounting plate by use of twoclamping knobs 22 screwed onto the studs and securing the mounting baseto the mounting plate.

The upper end of the mounting base 21 supports and centers the topflange of funnel 23. An upper support plate 24 (FIGS. 2A and 6) rests onthe top flange of the funnel. This plate supports eight removablemodules 25 in a circular array about an axis 26 through the center ofthe plate 24. A lower support plate 27 (FIGS. 2A and 7) rests on theledge 21L of the mounting base. It is connected to upper support plate24 by an array of eight circularly spaced vertical support plates 28,preferably made of molded plastic and having bosses 28B at upper andlower edges receiving screws through the holes 24H and 27H in the upperand lower support plates 24 and 27, respectively. This assembly ofplates 24, 27 and 28 provides a receiver frame in the ingredient storageassembly 18 for the eight removable dispensing modules 25 mentionedabove. These modules have motor housings 29 supporting container bases31 receiving eight ingredient containers 32. Each of these containerscontains a different type of solids capable of being blended into thebase product flowing from the freezer to the spigot outlet when thehandle 16 is pulled down. A “solid” for such purposes may be defined asa discrete tangible edible item appearing dry to touch at 72° F.,elastic or inelastic, porous or non-porous, hollow or not hollow, andhaving a maximum overall dimension in any direction less than or equalto about 0.300 inches. Some types of solids include, but are not limitedto, nuts of different types and flavors, raisins, M & M's, chocolatechips, different flavors of fruit bits, different flavors of candy bitsand sprinkles, to name a few. Others may be used too. Also, if it isfound that customers have a greater preference for one type than some ofthe other types, more than one of the containers can be filled with thepreferred type.

All of the eight modules can be identical, so a description of one willsuffice. Referring to FIG. 2A, note that the module shown to the left ofthe axis 26 shows motor housing 29 with a gear motor assembly 34 inside,but a gear motor assembly for the module to the right side of axis 26 isomitted from the drawing to show other details of the module. Referringspecifically to FIGS. 2A and 8, each motor housing 29, usefully made ofmolded plastic, has a mounting portion 29 M which is shaped like asector of a circle, and is received on upper support plate 24. Thehousing has a cylindrical wall 29W projecting up from portion 29M andforming an upwardly opening cylindrical chamber 29C (FIG. 2A). Thebottom 29B of chamber 29C is the top of an area of mounting portion 29Mand has a hole 29H which is in registry with one of the eight holes 24Pin the support plate 24.

Container base 31 (also usefully made of molded plastic) sits atop themotor housing 29 and has three hooks received on posts 29P of housing 29and engaging and hooked to screws 33 in posts 29P by a counterclockwisetwist of the base 31 relative to the housing 29. The bottom 31B of thecontainer base 31 has a hole 31P (FIG. 8) which is in a sectordiametrically opposite (relative to axis 41) the sector in which hole24P in the upper support plate 24, and hole 29H in the housing 29 arelocated, the latter holes 24P and 29H being open to the funnel 23.

The gear motor assembly 34 with motor portion 36 and reduction gearportion 37 is fastened by screws (not shown) to the bottom of themounting portion 29M of the motor housing. The output drive shaft 37S ofthe gear portion projects up through a small hole in the center ofchamber bottom 29B, and through the hub 38H of ingredient transferimpeller 38 (FIGS. 15A, 15B) which has four blades 38B circularly spacedabout the shaft axis 41. The blades are about half the height of thechamber 29C. The upper portion of the leading (when the impeller isdriven in the direction of arrow 42) edge of each blade is sloped uptoward the trailing edge. This feature helps avoid jamming of certaintypes of ingredients between the impeller blades and the roof of thechamber 29C. The shaft 37S also projects through a small hole in thecenter of bottom 31 B of the container base 31 and through the hub ofthe four-arm agitator 43 (FIG. 16). The shaft receiving holes in thecenter of the transfer impeller hub and in the center of the agitatorhub have a flat which matches the flat on drive shaft 37S to drive theimpeller and agitator when the motor is energized. A rubber cap 44 holdsthe agitator on the shaft. As shown in FIG. 16, the agitator arms areslightly offset ahead of radii from the rotational axis 41 of theagitator. Accordingly the leading edges of the agitator arms are aboutone-half arm's width ahead of the leading edge of the transfer impellerblades. This is shown in FIG. 16 where the impeller arms are shown indotted lines. This feature assists in the transfer of ingredients from acontainer 32 to chamber 29C.

The container base 31 provides an upwardly opening cylindrical chamberwhich friction fits and receives the neck portion 32N at the open end ofcontainer 32. The fit is close enough that there is no leakage of thedry ingredients up and out of the base 31 around the container neck.

Each module is retained in place in at least two ways. The first wayinvolves a motor housing retainer plate 46 fastened to upper supportplate 24 by four screws 47 equally spaced circularly, about axis 26,with spacers 48 between plates 24 and 46. The spacing thereby providedadmits the tongue 29T (FIG. 8) of the motor housing and prevents it fromtipping up.

A second way the module is retained is by a clamping knob 51 fixed to ascrew 52 which is freely receivable into a slot in leg 53L of bracket 53which is fixed to the inside wall of motor housing 29. The slot isforked with its open end facing toward axis 26. The screw is threadedinto lower support plate 27 so that, when a module is properly insertedas in the direction of arrow 56 (FIG. 2A) toward axis 26, the screw isreceived in the fork slot and the knob 51 can be turned to clamp themodule to the lower support plate 27. So it is clamped to the receiverframe of plates 24, 27, 28.

Each of the modules has two electrical contactors 58 on the inner faceof the motor housing and which, when the module is installed, engagecontactors such as 59 mounted on the vertical supports 28, to enableelectric power feed from an electronic controller 61 (FIG. 1) to themotors 36. An eight pair connector socket 62 fixed in the mounting basereceives mating plug 63 fixed in the lower support plate 27. The twocontactors 59 from all of the eight stations are wired to plug 63. Apair of leads from the socket at 62 extend in wire 64 to the plug 66received in socket 67 at the end of wiring 68 which enters the wiringharness 69, which extends to the controller 61. The wiring harness alsocontains cables 71, 72 and 73, each of which has an electrical socket atthe end for connection to some component of the apparatus. Cable 71connects to a plug 74 for communication with the data entry panel 76.Cable 72 connects to a plug 77 for cable 78 to an auger drive motor 79.The plug on cable 73 is connected to socket 81 for the dispenser startswitch 82. This arrangement makes it easy to disconnect the electricalcomponents by simply removing the mounting base cover panel 83 from thebottom of the. mounting base and unplugging the electrical connectors.

The data entry panel (DEP) 76 is received in a downwardly opening slot84 (FIGS. 2A, 2B and 5) by sliding it upward into the slot 84 and intochamber 85 in the mounting base. It is retained in place by the mountingbase cover panel 83 which is screwed into the bottom of the mountingbase. The face of the keypad has legends for programming the equipment,as will be described hereinafter. The output from the keypad is fedthrough connector 74 and cable 71 in harness 69 to the controller 61.

A blender assembly 90 has a housing 91 (FIG. 2B and FIG. 18 bottom view)mounted to and supported on the freezer by a mounting bracket (notshown) to secure the blender assembly to the freezer. The blenderassembly is coupled to spigot 13 by adapter 92 having upper end 92Ureceived on and sealed by an o-ring to the spout. The adapter has flange92F receiving a collar 92C connected to the upper. end portion 90U ofthe blender assembly by a split ring retainer 92R in a circular groovein the upper end portion of the blender assembly. The adapter is sealedby an o-ring to the inside surface of the upper end portion 90 U of theblender assembly. Varieties of mounting brackets and adapters areavailable to accommodate different freezer configurations. Since afreezer typically dispenses in some axial direction, it can beconvenient but is not necessary to adopt such axis in implementing thepresent invention. In the present example, an axis 93 is established bythe housing 91 for the blender assembly. A blender hopper 94 is mountedto housing 91.

Since the blender hopper is to receive solid ingredients from selectedones of containers 32, the housing 91 has two upwardly-opening circularports 91P to which tubing 96 can be connected to deliver ingredientsfrom hopper 23 through the housing 91 to the blender hopper 94. In FIG.18, these ports are shown, but need not be, located on diametricallyopposite sides of the cylindrical wall 91W of the housing and which iscentered on axis 93. It is adequate to use only one of these ports forconnection to the tubing, but two of them are provided to facilitatealternate entry locations for adaptation to freezers of differentdesigns.

The illustrated transfer tubing 96 comprises lengths of transparent PVCplastic with assorted shapes assembled to adapt to the particularfreezer configuration. The tubing has a conical upper end portion 96Ureceiving the tapered lower end portion 23L of hopper 23. As can be seenin FIG. 2B, while the lower end portion of the dispensing hopper 23, andthe upper end portion 96U of the tubing 96 are conical in shape to fitwell together and avoid entry of dirt into the tubing 96, they are notwedged together. Being a slip-fit, the dispensing hopper and assemblyabove it can be separated easily from the apparatus below it if, andwhen desired. The lower end of tubing 96 has the elbow 96E received inone of the ports 91P of the housing 91. The unused port (or ports, ifprovided) 91P can be closed by a cap or caps such as 91T in FIG. 11.

In the illustrated example, the blender hopper 94 (FIGS. 12 and 15),usefully made of molded plastic, is shown in the form of a steppedconical device having two diametrically opposite outwardly-extending topflanges 94F, each extending approximately 60 degrees about axis 93. Theblender hopper is mounted to the bottom of the housing 91 by placing thetop edge of the hopper against the bottom face of the housing. Then thehopper is turned clockwise (as viewed from above) to move the hopperflanges 94F into position in grooves formed between arcuate retainerclips 91R (FIG. 2B) and flanges 91B (FIG. 18) on the bottom of thehousing. The retainer clips are of the same shape as the flanges 91B andare screwed into the bottom of housing 91 at flanges 91B (FIG. 18).

The hopper has an inner wall surface which is stepped. In theillustrated example, the wall surface includes an upper cylindricalportion 94U with flanges 94F at the top, the upper portion extendingdownward to a first circle. An upper conical portion 94H extendsdownward from the first circle to a second circle. A second cylindricalportion 94C extends downward from the second circle to a third circle. Asecond conical portion 94L extends downward from the third circle to afourth circle at the bottom of the hopper. A blending chamber 94M issurrounded by the lower portion 94L of the hopper.

The blender hopper surrounds a blending auger 97 of the screw type andwhich is centered on axis 93. The blending auger has a gear 98 integralwith it or affixed to it and driven by a gear set 99 in a drive housingportion 91G of housing 91. At this point it should be mentioned that,while FIG. 1 shows tubing 96 entering housing 91 at a port locationoffset from and forward of axis 93, FIG. 2B shows tubing 96 entering thehousing at 91P to the right of axis 93. As mentioned above, the twoports are available for the use of whichever one or both are convenient,depending on the configuration of the freezer. Also, if desired,locations of the ports relative to each other and to the drive housingportion 91G can be different from shown. There is an opening 91 H (FIG.18) through wall 91W in the proximal end of drive housing portion 91Gwhere one of the gears in the gear set 99 engages gear 98 on the auger,as shown in FIG. 2B. The gear set is driven by a pinion 102 on theoutput shaft of blender motor 79 mounted to the distal end of the drivehousing portion 91G.

The housing ports 91P open downward into a space 91C (FIG. 11) under thecylindrical inner wall 91W of the housing 91 and open to the upper endsof the screw flights of auger 97. The blending auger 97 (FIGS. 9-14),which may usefully made of molded plastic, has a central, axiallyextending hollow core 97C (FIG. 10) on which there are two helicalflights 97A and 97B, each of which is centered relative to axis 93. Eachof the flights has a leading edge which is beveled downward and rearwardas shown at 97L (FIG. 12). Each flight is contoured to have a profilewhich fits the profile of the stepped conical inside wall surface 94H,94C and 94L of the blender hopper 94. Thus, it is seen that the augerflights have a profile contoured to sweep the inside space of theblender hopper outboard of the auger core as the auger is rotated onaxis 93. To improve the efficiency of the auger, the perimeter of eachflight has an edge which is cylindrical or beveled to conform to whereit is axially along the auger relative to the inside wall surface of thehopper.

A spindle tube 103 is a stationary tube having a longitudinal axisco-linear with axis 93, and is fixed to the housing 91. The tubedelivers the flow of the frozen base product from the freezer to theblending chamber 94M. The tube also serves as an axle spindle forrotational bearing of the auger. The lower end 103B of the tube 103 isspaced above the base 94B of the blender hopper. The resulting spacebetween the end of the tube 103 and the base 94B of the blender hopperallows the solids delivered by the auger to enter into the flow path ofthe frozen base product.

While the frozen base product flows, the auger 97 rotates clockwise(viewed from above) on the tube 103 and delivers the selected solidsinto the blending chamber 94M. The inside diameter d1 (FIG. 14) of thetube 103 is less than the overall maximum diametrical dimension d2(FIGS. 14 and 15) of the fluted hopper outlet opening 94D. This allowsunrestricted flow from the tube 103 through the blending chamber 94M andthen through the hopper outlet opening 94D (FIG. 14). This sizedifferential allows for the inclusion of the solids into the frozen baseproduct in the blending chamber 94M for delivery of the blended productout through the blended product outlet opening 94D. It should beunderstood that the outlet opening can be circular or other shapes.

Two diametrically opposite cutouts 97P (FIGS. 9 and 11) in the augercore 97C near the bottom of the auger 97, allow the solids to beintroduced into the flow path of the frozen base product while the auger97 is rotating. The rotation of the auger 97, at approximately 400 rpm,inhibits the frozen base product from entering the outer circumferenceof the blending chamber 94M and working upward along hopper wall surface94L. The rapid rotation of the auger 97 tends to confine flow of thebase product to a flow path directly downward from the opening of thetube 103 and through the opening 94D.

The two helical flights 97A and 97B of the auger 97 are each providedwith a two-step diminishing radius (with respect to the rotational axis93). This diminishing radius provides a swept volume profile by therotating auger and which fits the above-mentioned contour profile of thestepped inside wall surface (94H, 94C and 94L) of the blender hopper 94.The diminishing radius of the contoured wall of the blending chamber 94Mcauses the solids to be forced inward toward the flow path of the frozenbase product. The diminishing radius also counters the tendency for thebase product to flow to the outer perimeters of the blending chamber94M. The diametrically opposite cutouts 97P in the core wall of theauger, enable the solids to be forced inwardly into the frozen baseproduct as it flows from the lower end 103L of the spindle tube to theoutlet opening 94D.

The cutouts 97P through the core wall under flights 97A and 97B at thebottom faces such as 97U (FIGS. 9 -14) may be formed in or cut in orotherwise provided in a material. Therefore the term “cutout” should notbe construed as limited to an opening that is cut into the material.

FIG. 13 shows the core wall portions at section 13-13 in FIG. 10,immediately uphill of the beginning of the cutouts 97. FIG. 14 showswhere the inner surface of the core flares outward in curves at section14-14 to blend into the bottom faces of flights 97A and 97B immediatelybelow where the cutouts begin downward toward the lower ends of theflights.

This provides easy entrance of solids into the frozen base productstream under the lower end 103L of spindle tube 103 flowing to outlet94D as the auger rotates in the direction of arrow 104 (FIG. 10), whichis clockwise when viewed from the top of the auger. Portions of theinside wall of the core 97C continues down as shown in FIGS. 11 and 14supporting the tips 97T of the flights in cantilever fashion at thebottom ends of the flights.

It should be noted that while it is very convenient, and preferred tohave the auger axis in line with the axis direction of discharge of baseproduct from the freezer, it is not absolutely necessary. Also, while itis preferred to have the passageway from the spigot through the blenderprovided by a tube which also serves as the bearing axle for the auger,the auger axis could be offset from the tube axis. Also, while the tubecan serve directly as the bearing for the auger, as shown, it couldsimply serve as a mounting for separate bearings.

Referring to FIG. 18, the data entry panel (DEP) 76 has numerals 1-8,each designating a “key” by which the dispenser operator can select adifferent one of the eight ingredient containers. It also has severalother “key” identifying legends on it, including a “cancel entry”legend, a “+”, a “−”, and an “alt time adj” legend. It also has an“output level” indicator light emitting diode set with eight enumeratedlevels, and an “overload” indicator light.

Operation

As indicated above, a typical embodiment of the invention is intended tobe attached to a freezer capable of delivering an icy base product, toblend or mix various ingredient solids into the base product as it flowsfrom the freezer toward a customer's serving cup. The system exampledescribed above accommodates eight different ingredients. The operatorcan select a single ingredient or up to as many as eight differentingredients to be blended into a single serving of the frozen baseproduct.

To dispense a serving to a customer, the operator determines the outputlevel (the duration of time of operation of each of the selectedingredients) per cycle of dispensing ingredients requested by thecustomer. Then the operator touches those of the selector “keys” neededfor the ingredients requested by the customer. This sets up the programfor the controller 61 to activate, in sequence, the dispenser motors 36for those of the eight containers holding the ingredients requested bythe customer. Then the operator pulls the draw handle 16 down, enablingthe frozen base product to flow down through the auger axis passagewayin spindle tube 103. When the operator pulls the draw handle down, thedraw switch 82 is closed which activates the dispensing motor 36 in thedispensing module that represents the lowest numbered choice in theoperator's selection 1-8. As the motor activates, it rotates thetransfer impeller 38 that takes the ingredient solids from the selectedcontainer 32 and transfers them to the registering openings 29H, 24Pdropping the solids into the dispensing hopper 23. The transfer impellerserves both as a valve and a device to transfer the ingredients towardthe dispenser hopper 23. The solids flow down through the transfertubing 96 into the blender hopper 94 and down through the hopper undercontrol of the auger 97, into the blender chamber 94M where the solidsare integrated into the frozen base product as the base product flowsout of the lower end of spindle tube 103.

At the same time that the draw switch is closed to start the dispensingprocess, the blender motor 79 is activated, rotating the blending auger97 in a clockwise direction (viewed from above) to force the ingredientsolids into the frozen base product while it flows from the spindle tubethrough the hopper outlet opening 94D into a cone or dish for thecustomer. If the operator has selected a multiple of possible choices ofingredients, the system dispenses each choice singularly and in theascending sequence of the numbers of the choices selected on the DEP(data entry panel) 76. The operating time is equal for each dispensingmodule during a sequence through the operator's selection. When thesystem has sequenced through all of the choices (completed a cycle), itreturns to the initial choice and continues the rotation through theselected choices until the operator chooses to discontinue the processby closing the spigot draw handle. The operating time for each modulecan be changed to increase or decrease the cycle time for each serving,by touching the “alt time adj” “key” and the “+” or “−” key. As theoperator changes the cycle time, the “output level” lights areilluminated accordingly to indicate the output of the solids into thefrozen base product. For example, if the adjustment is such that light 9is on, it indicates that each module in a selection following the “alttime adj” adjustment will dispense solids longer in a cycle than if theadjustment were such that light 6 was on. The average typical cycle timeis 1 second. The preferred minimum cycle time is 0.2 seconds. Thepreferred maximum cycle time is 2.0 seconds. Other cycle characteristicscan be specified, if desired. The draw duration is typically between 5and 10 seconds. This depends primarily upon the size of serving to bedelivered to the customer, and the delivery speed of which the freezeris capable. In any case, the controller 61 will repeat the cyclingthrough the choices as long as the draw switch 82 remains closed. Itshould be understood that some freezers have switch keys, rather thanhandles to operate a switch to draw the frozen base product from thefreezer. In such cases, such switch can be used instead of switch 82 tooperate the apparatus of the present invention. Therefore the term“switch” where used in the claims which follow herein, should not beconstrued as limited to a separate, handle operated switch, except whererequired by claim context.

To refill a container, the module is removed by loosening the retainingknob 51, and pulling the module radially outward. Then it is inverted,so that the container 32 is upright. Then the module is pulled upwardoff the container. Then the container can be refilled with the sameingredient, or cleaned and refilled with some other ingredient.

From the above description, it can be recognized that all of thedisclosed apparatus can be easily disassembled for cleaning, and thenre-assembled.

The apparatus can be powered conveniently by any suitable electricsource, an example being a power supply portion of controller 61 andoperable on either 110 or 220 volts at 50 or 60 hertz.

The above description refers to the use of a draw handle to initiatedelivery of base product from the freezer, and delivery through aspigot, and a switch associated with the draw handle to initiateoperation of the dispenser motors and the auger. It should be noted thatthe invention is useful on a variety of freezers. Therefore, initiationof flow of the base product and controller functions can be triggered bysome initiator other than a draw handle. Examples include but are notlimited to a switch key or a sound or voice-activated switch. The use ofthe term “key” should be understood to mean some activator spot ordevice responsive to the operator's command, however delivered. Wiring,electronics and software for the selector and controller to produce thefunctions described herein are well within the skill of the art, anddescription herein would be superfluous.

Therefore, while the invention has been illustrated and described indetail in the drawings and foregoing description, the same is to beconsidered as illustrative and not restrictive in character, it beingunderstood that only a preferred embodiment has been shown and describedand that all changes and modifications that come within the spirit ofthe invention are desired to be protected. It should be understood thatwhile the use of the word preferable, preferably or preferred in thedescription above indicates that the feature so described may be moredesirable, it nonetheless may not be necessary, and embodiments lackingthe same may be contemplated as within the scope of the invention, thatscope being defined by the claims that follow.

1. A method for blending dry edible solid ingredients with a frozen baseproduct comprising: starting a flow of the frozen base product from afreezer outlet to a blending chamber to flow through the chamber to ablended product outlet; selecting a plurality of types of edibleingredient solids and entering solids of the selected types into saidblending chamber; augering said selected types solids into flow of saidbase product when flowing through said chamber and thereby producing ablend of said solids in said frozen base product; and delivering saidblend out of said blending chamber through said blended product outlet.2. The method of claim 1 and further comprising: storing in containers,a plurality of solids of different types of edible ingredients, eachdifferent type in a different container; selecting certain ones of saiddifferent types for blending; releasing the solids of the selected typesfrom those of said containers storing said selected types, into the flowof said frozen-base product; and blending the solids of the selectedtypes into the flow of said frozen-base product.
 3. The method of claim2 and further comprising: rotating transfer impellers by motor driversfor releasing said solids.
 4. The method of claim 2 and furthercomprising: releasing said solids of said selected types in sequence ofone type following another type.
 5. The method of claim 4 and furthercomprising: predetermining the said sequence prior to starting the flowof said frozen base product; releasing each of said selected types for acertain period, and releasing all selected types in a release sequencecycle; and repeating said sequence cycles while said frozen base productcontinues to flow to the blending chamber.
 6. The method of claim 5 andfurther comprising: actuating a device for starting the flow of saidfrozen base product from the freezer outlet; and responding to theactuation of the device to initiate the releasing and augering of saidsolids into said blending chamber.
 7. The method of claim 6 and furthercomprising: using actuation of said device to initiate operation of botha blender motor and the said sequence cycle.
 8. The method of claim 1and further comprising: using a rotary auger with spiral flights formedaround a hollow core with a longitudinal axis; and flowing said frozenbase product from said freezer outlet downward through said core towardsaid blended product outlet.
 9. The method of claim 8 and furthercomprising: providing a wall having an inside surface circular aroundsaid axis and surrounding said auger; providing matching profiles ofsaid auger and said inside surface thereby fitting said auger to saidinside surface; sweeping downward on said surface with said augerflights while rotating said auger relative to said wall, on said axis;using a conical portion of said interior surface to guide said solidsinward as they are swept downward by said rotating auger, into saidfrozen base product flowing downward from said core through said chamberto said blended product outlet.
 10. The method of claim 9 and furthercomprising: admitting solids swept downward, into said flowing frozenbase product, through cutouts between flights in said core.
 11. Themethod of claim 10 and further comprising: enabling solids guided inwardinto said cutouts as said auger is rotated, to move upward relative tothe bottom of the flight above the cutout at the location of entry ofthe solid into the cutout, and move inwardly along a curved surface ofsaid auger toward said axis and into said flowing frozen base product.